Revert of Adds back some debugging code

Revert of Adds back some debugging code (https://codereview.chromium.org/257023002/)

Reason for revert:
Breaks ash_unittests FullscreenWindow 

VideoDetectorTest.FullscreenWindow (run #1):
[ RUN      ] VideoDetectorTest.FullscreenWindow
[21122:21122:0428/162209:675210655:WARNING:cras_audio_handler.cc(472)] Audio input allowed by policy, sets input id=0x0 mute=false
[21122:21122:0428/162209:675210697:WARNING:cras_audio_handler.cc(508)] SetInputMuteInternal sets active input device id=0x0 mute=0
[21122:21122:0428/162209:675210737:WARNING:cras_audio_handler.cc(429)] SetupAudioInputState for active device id=0x2715 mute=0
[21122:21122:0428/162209:675210757:WARNING:cras_audio_handler.cc(508)] SetInputMuteInternal sets active input device id=0x2715 mute=0
Xlib:  extension "RANDR" missing on display ":9".
Xlib:  extension "RANDR" missing on display ":9".
[21122:21122:0428/162209:675250984:FATAL:window_observer.cc(18)] Check failed: 0 == observing_ (0 vs. 1)

Original issue's description:
> Adds back some debugging code
> 
> We're getting another crash that looks like an observer is being
> destroyed before removing itself.
> 
> BUG=365364
> TEST=none
> R=flackr@chromium.org
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=266681

TBR=flackr@chromium.org,sky@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=365364
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=266691

[robliao, 2014-04-28 23:41:06]

Created Revert of Adds back some debugging code

[robliao, 2014-04-28 23:41:27]

The CQ bit was checked by robliao@chromium.org

[commit-bot: I haz the power, 2014-04-28 23:41:53]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/robliao@chromium.org/252963003/1

[commit-bot: I haz the power, 2014-04-28 23:43:12]

Change committed as 266691